Cumberland County Clerks maintain public records for a county or local government in Illinois. In some states, Clerks play a role in carrying out public elections, working in connection with Boards of Elections and the Illinois State election commissions. Clerks can process Cumberland County voter registration applications and verify whether an individual is eligible to vote, and they maintain up-to-date lists of registered voters. Cumberland County Clerks may also provide online information about how to register to vote or where to vote. Citizens may also be able to register to vote at a Clerk's Office.

Cumberland County Boards of Elections are responsible for carrying out public elections, and one of their duties is to process Cumberland County voter registration applications submitted by citizens in Illinois. A Board of Elections certifies eligible voters in their particular jurisdiction and maintains an up-to-date list of registered voters in Cumberland County. They also verify voter information and may contact registered voters to keep Cumberland County voter list information current. Boards of Elections are usually operated at the county or local level, and may be known as a Board of Registrars.